Well fact is, the more breathing mods you add, the more the airflow meaning in terms of tuning, the leaner your car will become (more air for the same fuel => Leaner mixture). So if your car is rich from the factory, then leaning her out will get it closer to the optimum A/F ratio, making her mod-friendly
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'14 Viper GTS
'08 RB'd G37S - Sold
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